<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // [2,3,1,1,4]
        function jumpGame(nums){
            let max =nums[0]
            for(var i =0;i<nums.length;i++){
                if(i<=max){
                    max =Math.max(nums[i]+i,max) 
                }
            }
           return max>=nums.length-1?true:false
        }
        console.log(jumpGame([1,2,3]))
    </script>
</body>
</html>